Extension Agents get used to hearing that the local Extension Office is the community’s best kept secret. As much as we try to let folks know we’re here, many are still unaware of the services we provide. Even amongst the residents that are familiar with us, some of the services available remain unknown, especially our identification and diagnostic services. Here’s a rundown on some of the services available through your UF/IFAS Extension service.
Taking a soil sample. UF/IFAS Photo by Tyler Jones
Soil Testing
This is probably our most well-known service, but it’s worth a reminder. For only $3 (pH only) or $10 (pH plus plant macro- and micro-nutrient values) per sample, plus shipping, you can have your soil analyzed in a state-of-the-art facility. To be clear, soil testing only provides a reading of your soil’s chemistry, specifically pH (acidity/alkalinity) and plant nutrient values. It does not provide information on any diseases or potential toxins that may be present in the soil. In addition to the results, you can specify the general type of plant you’re trying to grow (various grass species, vegetables, citrus, general trees and shrubs, etc.) and the report will provide recommendations to adjust the nutrient levels to be sure that plant is able to thrive. Your local agent receives a copy to help answer any questions you may have about the results or recommendations. More about soil and nutrient testing can be found at the Extension Analytical Services Laboratory website.
Experts at the Plant Disease Diagnostic Clinic can identify diseases present. Credit: UF/IFAS.
Plant Disease Diagnosis
UF/IFAS Extension has a great plant pathology lab on campus, but we also have a great resource close by in Gadsden County at the North Florida Research and Education Center’s (NFREC) Plant Disease Diagnostic Clinic. For a modest fee of $30, you can submit a sample of a diseased plant, and the lab manager will use the available methods to confirm the presence of disease and identify the disease-causing organism. Just like with the soil test results, you are provided with a recommendation on how to best treat the disease. The NFREC Plant Disease Diagnostic Clinic website has submittal forms, contact information, and directions for collecting a quality sample.
Need help with insect id? The DDIS system can help. Credit: UF/IFAS.
Plant and Insect Identification
While your local extension agent enjoys receiving plant and insect identification, there is an online submittal option available to use as well through our Distance Diagnostic Identification System (DDIS). You can set up an account and then upload photos of plants, insects, mushrooms, even diseased plants, and an expert on UF’s campus will do their best to identify it for you. The DDIS website has more information to help you set up a user account.
The Florida Cooperative Extension Service has many ways to help Florida citizens diagnose their landscape issues using science-based methods conducted by experts in state-of-the-art facilities. The above services are just a selection of the diagnostic capabilities available. To see a complete list, visit the IFAS Diagnostic Services website. You can always contact your local extension office, too, for assistance in identifying plants and insects, as well as diagnosing diseases.
You may recognize the arrival of summer because of the intense buzzing sound coming from the trees. It can last all day long, with changes in the pitch and pattern of the screaming.
Dusk-calling cicada, Tibicen auletes (Germar). Total length (head to tips of forewings) is 64 mm (about 2 1/2 inches). Photograph by Lyle J. Buss, University of Florida.
Cicadas are large (3/4” – 2 ½”) winged insects with stocky bodies and bulging eyes. They spend the vast majority of their lives underground, emerging in massive numbers for just a few weeks to mate and lay eggs. This behavior often earns them the name “locusts,” which entomologically they are not.
In much of the eastern United States, periodical cicada (Magicicada spp.) broods rise up out of the ground every 13 or 17 years. In the summer of 2024, two different broods (one group of 13-year cicadas and one group of 17-year cicadas) will arrive at the same time across 16 states. The closest to us will be mid-lower Alabama. Approximately one trillion insects are anticipated. This only happens once every 221 years.
By emerging in large numbers, the cicadas are able to reduce the potential of being eaten by predators. Though many will be lost to birds and killer wasps, enough will survive to be able to reproduce.
Unlike the broods of periodical cicadas, populations of Florida’s 19 cicada species produce adults every year. However, the nymphs still spend several years developing underground. The nymphs use their piercing-sucking mouthparts to feed on the xylem sap in the roots of trees. The feeding can weaken already stressed trees. Most trees tolerate the damage quite well. After gaining enough nutrients, the nymphs wait for the soil to warm enough (approximately 64° F. at six inches deep) before crawling out of the ground, climbing up the tree trunk, and molting into adults with wings. You can often find the empty shed exoskeleton still hanging on the tree trunk.
The adult male spends all day being as loud as possible in order to attract the girls. Each species has its own song. Large numbers of insects create more noise. Male cicadas have a pair of tymbals located on the sides of their abdomen. Tymbals are corrugated regions of the cicada’s exoskeleton that can be vibrated so rapidly that the clicking sound becomes a high-pitched buzz. Cicadas with the best abs get the girls and reminds all the humans that summer is here.
Cicada (Tibicen sp.) escaping its nymphal skeleton. The cast skeleton will remain attached to the tree. Once free, the adult will expand its wings, darken, and fly away. Photograph by Lyle J. Buss, University of Florida.
Now that we are moving into warmer soil temperatures, weak areas in lawns will have a better chance of making some recovery. However, this is highly dependent on whether or not correct lawn maintenance practices are followed. These practices include fertilizing, mowing and watering correctly.
Warmer soil and correct care help improve weak lawns
Many North Florida lawns came out of winter weak and thinning this spring. In areas of the lawn where there is at least sixty percent cover of the desirable type of lawn grass, recovery is possible. But where there is less than sixty percent desirable cover, reestablishment should be considered.
Applying the correct type and amount of fertilizer will promote lawn recovery. To maintain a healthy Florida lawn, it’s critical to use a fertilizer with adequate potassium. In most cases, use a lawn fertilizer with equal amounts of nitrogen (first number) and potassium (third number) such as 8-0-8, 10-0-10, 15-2-15 or similar analysis. Phosphorus (second number) should be low or zero unless you have the results of a reliable soil test indicating that more phosphorus is needed. Err on the side of being light handed when applying fertilizer to the lawn. In North Florida, most lawns will do just fine with an application in spring no earlier than mid-April and a second application in summer no later than mid-September.
Follow these mowing practices for a healthy lawn.
Never remove more than 1/3 of the leaf blade height at any one time.
Here’s the recommended mowing height in inches for each lawn grass: bahia – 3 to 4; centipede – 1.5 to 2; standard St. Augustine cultivars – 3 to 4; dwarf St. Augustine cultivars (Captiva and Seville) – 2 to 3; zoysia cultivars suitable for home lawns- 2 to 2.5; bermuda – .5 to 1.5.
Keep mower blades sharp.
Follow these irrigation practices for a deeper rooted and drought tolerant lawn.
Turn your automatic sprinkler system off and learn to operate it manually on an as-needed basis. Your lawn needs water when leaf blades start to fold in half lengthwise or when footprints remain visible in the lawn long after being made. Irrigate when at least 30% of the lawn shows these signs of water need.
Apply ½ – ¾ inch of water when you do irrigate. Place empty, straight-sided cans in the area being irrigated to see how long it takes to reach this amount.
Irrigate during early morning for more efficient water use and to minimize lawn diseases.
Here is a link to a UF/IFAS Extension publication on Best Management Practices for a Florida lawn. http://edis.ifas.ufl.edu/ep236
Written by: Muhammad Adnan Shahid and Shahid Iqbal.
UF/IFAS Horticultural Sciences Department, North Florida Research and Education Center, Quincy FL
Biostimulants are a type of substance or microorganism applied to plants to improve their nutrient efficiency and resistance against abiotic stress (salinity, cold, heat, UV, flooding, drought, heavy metal toxicity, nutrient deficiency), diseases, and quality traits. Due to the increase in world population, the growing pressure on crop productivity is a demanding challenge; therefore, it is necessary to reduce the use of agrochemicals with negative impacts on human health and the environment. Thus, new strategies from the bio-based industry must be found and adopted. Citrus is a highly desirable and profitable fruit crop with undesirable characteristics like excessive flowering and physiological fruit disorder that negatively affect the market value.
Biostimulant Types and Practical Application
Many crop growers have expressed an interest in biostimulants in recent years. As these products gain popularity, we have found that there’s still a lot of controversy about their efficacy. Before determining whether Extension endorses them, let’s review the various types and their practical usage.
Several types of biostimulants include humic and fulvic acid, seaweed extracts, protein hydrolysates, chitosan, beneficial bacteria, fungi and microbial inoculants, and other types of amino acids and polyamines. These products are commercially available with different formulations and ingredients and have immense potential in horticultural crop production, especially in citrus.
Plant biostimulants can be applied through foliar application, fertigation, or directly through the soil, enhancing crop growth and quality. Biostimulants could reduce plant environmental threats and minimize the negative consequences of unsystematic chemical application.
Benefits of Using Biostimulants in Citrus Crop Production
Biostimulant products improve plants’ overall health and help maximize fruit production and quality by providing complete nutrition. The benefits of using biostimulants are highlighted below.
Improve plant metabolism to induce high-yield and quality.
Enhance soil fertility by fostering complementary soil microorganisms.
Increase tolerance against abiotic stresses.
Facilitate nutrients and their movement inside the plant vessels
Boost fruit quality attributes like color, sugar content, etc.
Application of biostimulants and its effect on plant growth and quality traits.
Concluding remarks and recommendations
Biostimulants are in the frontline as a novel strategy to achieve the goal of sustainable citrus crop production, yield, and superior quality. Proper management practices are important for high-yield and quality fruit in citrus production. The use of biostimulant products can provide producers with sustainable production. Before using these products, contact a regional extension specialist or citrus expert for their proper application and trail setup. The Fruit Physiology Lab at North Florida Research and Education Centre (NFREC), Quincy, Florida has started a research project on determining the efficacy and efficiency of different microbial and non-microbial biostimulants in cold hardy citrus production, to improve yield, and fruit quality. For any further information on the use of biostimulants please contact Dr. Muhammad Shahid, Fruit Physiologist/Assistant Professor of Horticulture at mshahid@ufl.edu.
Landscaping in the Panhandle of Florida comes with many opportunities and challenges in this diverse plant environment of coastal, flatwoods (aka pine woodland), sandhills, and clay soil areas running adjacent to the Alabama/Georgia lines. Sandy soil is the predominate soil of the panhandle area from coastal saltwater marshes and brackish bay waters to wetlands and drier well drained quartz sandy soils of the sandhills. Unique ecosystems can be found in all these areas. One of the areas with the largest plant diversity is the Longleaf Pine savannahs found in the sandhills. Now comes the question of landscaping decisions for your residential living.
Native landscape plants. Photo Credit: Stephen Greer, University of Florida/IFAS Extension – Santa Rosa County.
Understanding your soils and how to improve them where you live is critically important before putting the first plant in the ground. We live in an area of abundant rainfall and this will impact the chemistry of your soils. Make an appointment with your local horticulture agent at the University of Florida IFAS Extension office in your county to discuss your soil and landscape ideas. Taking soil samples will likely be needed. With instruction you can easily collect the samples needed to be sent and received to determine the best options.
With abundant rainfall, leaching of key nutrients will occur removing base cations that can include potassium (K), magnesium (Mg), calcium (Ca) and others. This all leads to soils being more acidic in nature. Nutrient resources may need to be added and checked every 2-3 years, just be sure to follow the soil sample recommendations. Soils near wetland areas can leach differently than the deep quartz sandy soils of the sandhills. Adding organic amendments is a recommended practice. Just how much will depend on your soil setting; talk with your horticulture Extension agent. Often new homesites and commercial construction areas have soil brought in to raise or level construction locations. Understanding the movement of water through these newly added layers to the existing soil below will determine drainage and nutrient movement within this site. It can be confusing making decisions about adding soil nutrients, lime, and organic amendments.
Challenges in new soils in landscape. Photo Credit: Stephen Greer, University of Florida/IFAS Extension – Santa Rosa County.
Once all this is settled you can start thinking about how to enjoy this wonderful Panhandle outdoor living opportunity. Creating living spaces comes in many ways from building patios, porches, decks, outdoor kitchens, and strategically places chairs and benches. Talk with your family and others who may enjoy these places with you. Gazebos or barbeque grill areas may be in the plans. Placing these into the landscape takes planning. Draft designs and think of creative solutions for the site. Look at the site elevation changes from high areas to low wetland areas. Will you need “No See Um” screen for the porch to keep out the small insects or install ceiling fans to keep the breeze moving?
There are many questions to be asked. Create a list to be addressed before beginning a project and then determine the cost. Enjoy the adventure!
